{"uid":"cap_2YmJ546Fi6P-LUzFUMvHw","slug":"inventory-safety-stock-reorder-point-rop-calculator-8d83c2b5","name":"Inventory Safety Stock & Reorder Point (ROP) Calculator","description":"Deterministic inventory safety stock and Reorder Point (ROP) calculator for long-lead-time supply chains. Pass ?daily_units=15&lead_time_days=35&service_level_pct=95. Computes Z-score buffer across combined demand and lead-time variance, returning safety stock units, days of cover, ROP trigger units, and 60-day PO quantity.","url":"https://x402-niche-briefs.fly.dev/v1/reorder-point-safety-stock?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["daily_units","lead_time_days"],"properties":{"daily_units":{"type":"string","description":"Average daily unit sales velocity"},"lead_time_days":{"type":"string","description":"Supplier production + transit lead time in days"},"service_level_pct":{"type":"string","description":"Target in-stock service level percentage (50-99.9, default 95)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["as_of","inputs","assumptions","inventory_targets"],"properties":{"as_of":{"type":"string"},"inputs":{"type":"object","required":["daily_units","lead_time_days","service_level_pct"],"properties":{"daily_units":{"type":"number"},"lead_time_days":{"type":"number"},"service_level_pct":{"type":"number"}}},"assumptions":{"type":"object","required":["z_score","assumed_daily_demand_cv_pct","assumed_lead_time_cv_pct"],"properties":{"z_score":{"type":"number"},"assumed_lead_time_cv_pct":{"type":"number"},"assumed_daily_demand_cv_pct":{"type":"number"}}},"inventory_targets":{"type":"object","required":["lead_time_demand_units","safety_stock_units","safety_stock_days_of_cover","reorder_point_rop_units","reorder_trigger_days_of_stock_remaining","recommended_60_day_order_qty_units"],"properties":{"safety_stock_units":{"type":"number"},"lead_time_demand_units":{"type":"number"},"reorder_point_rop_units":{"type":"number"},"safety_stock_days_of_cover":{"type":"number"},"recommended_60_day_order_qty_units":{"type":"number"},"reorder_trigger_days_of_stock_remaining":{"type":"number"}}}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4ai29rZ1HrfYofUNX1yjA","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes safety stock units, days of cover, reorder point trigger, and recommended 60-day PO quantity from daily sales velocity, supplier lead time, and target service level.","exampleAgentPrompt":"Calculate my reorder point and safety stock for a product that sells 15 units per day with a 35-day supplier lead time — I want a 95% in-stock service level.","exampleUseCases":[{"title":"Import SKU reorder planning","prompt":"I import a product from overseas with a 45-day lead time and it sells about 20 units per day. Can you calculate my safety stock and reorder point at a 98% service level so I don't stock out?"},{"title":"Amazon FBA replenishment trigger","prompt":"My FBA SKU moves 8 units a day and my manufacturer takes 30 days to produce and ship. What's my reorder point and how much safety stock should I be holding at a 95% service level?"},{"title":"60-day purchase order sizing","prompt":"I need to place a PO for a product with 12 daily units sold and a 28-day lead time. Can you tell me the recommended 60-day order quantity and when I should trigger the reorder at a 90% service level?"}],"resultDescription":"Returns a JSON object with: the input echo (daily_units, lead_time_days, service_level_pct), assumptions used (Z-score, assumed demand CV%, assumed lead-time CV%), and computed inventory_targets including lead_time_demand_units, safety_stock_units, safety_stock_days_of_cover, reorder_point_rop_units, reorder_trigger_days_of_stock_remaining, and recommended_60_day_order_qty_units.","failureModes":["Missing required parameters daily_units or lead_time_days returns an error","service_level_pct outside 50–99.9 range may produce unexpected Z-score results","Non-numeric string values for numeric fields may cause computation failure","Very high lead times or service levels may produce extremely large safety stock recommendations that should be validated manually"],"whenToPreferThis":"Use this endpoint when you need a fast, deterministic, formula-based safety stock and ROP calculation for long-lead-time supply chains (import, overseas manufacturing) without needing historical demand data or probabilistic simulation. Ideal for ecommerce operators, Amazon sellers, and importers who want a quick, defensible inventory target from three simple inputs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T19:07:00.745Z","isFirstParty":false,"canonicalSlug":"inventory-safety-stock-reorder-point-rop-calculator-8d83c2b5"}